lua: added initial lua client

1 files changed, 77 insertions, 0 deletions

diff --git a/lua-client.c b/lua-client.c
new file mode 100644
index 0000000..9004dbf
--- /dev/null
+++ b/lua-client.c
@@ -0,0 +1,77 @@
+
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+
+#include "pingu_adm.h"
+
+#define LIBNAME "pingu.client"
+
+static int pusherror(lua_State *L, const char *info)
+{
+	lua_pushnil(L);
+	if (info == NULL)
+		lua_pushstring(L, strerror(errno));
+	else
+		lua_pushfstring(L, "%s: %s", info, strerror(errno));
+	lua_pushinteger(L, errno);
+	return 3;
+}
+
+static int pushfile(lua_State *L, int fd, const char *mode)
+{
+	FILE **f = (FILE **)lua_newuserdata(L, sizeof(FILE *));
+	*f = NULL;
+	luaL_getmetatable(L, "FILE*");
+	lua_setmetatable(L, -2);
+	*f = fdopen(fd, mode);
+	return (*f != NULL);
+}
+
+static int Padm_open(lua_State *L)
+{
+	const char *socket_path = luaL_optstring(L, 1, DEFAULT_ADM_SOCKET);
+	struct sockaddr_un sun;
+	int fd, ret;
+
+	memset(&sun, 0, sizeof(sun));
+	sun.sun_family = AF_UNIX;
+	strncpy(sun.sun_path, socket_path, sizeof(sun.sun_path));
+
+	fd = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (fd < 0)
+		return pusherror(L, "socket");
+
+	if (connect(fd, (struct sockaddr *) &sun, sizeof(sun)) < 0) {
+		ret = pusherror(L, socket_path);
+		goto close_err;
+	}
+
+	return pushfile(L, fd, "r+");
+
+close_err:
+	close(fd);
+	return ret;
+}
+
+static const luaL_reg reg_pingu_methods[] = {
+	{"open",	Padm_open},
+	{NULL,	NULL},
+};
+
+
+LUALIB_API int luaopen_pingu_client(lua_State *L)
+{
+	luaL_register(L, LIBNAME, reg_pingu_methods);
+	lua_pushliteral(L, "version");
+	lua_pushliteral(L, PINGU_VERSION);
+	lua_settable(L, -3);
+	return 1;
+}